What is the standard of review for a claim of ineffective assistance of counsel?

Thus, the standard of appellate review of a claim of ineffective assistance of counsel is well established. Reviewing courts defer to counsel's reasonable tactical decisions in examining a claim of ineffective assistance of counsel [citation], and there is a 'strong presumption that counsel's conduct falls within the wide range of professional assistance.' " [Citation.] "[W]e accord great deference to counsel's tactical decisions" [citation], and we have explained that "courts should not second-guess reasonable, if difficult, tactical decisions in the harsh light of hindsight" [citation]. "Tactical errors are generally not deemed reversible, and counsel's decisionmaking must be evaluated in the context of the available facts." [Citation.]' [Citation.]" (People v. Stanley (2006) 39 Cal.4th 913, 954.)